Loading device for scanning drums



May 21, 1940. H. CARLSON LOADING DEVICE FOR SGANNING DRUMS OriginalFiled April 8, 1958 2 Sheets-Sheet 1 NNN N mmm INVENTOR HAROLD CARLSONATTORNEY May 21, 1940. CARLSON 2,201,474

LOADING DEVICE FOR SCANNING DRUMS Original Filed April 8, 1938 2Sheets-Sheet 2 INVENToR HAROLD CARLSON B MCL/aiya ATTORNEY Patented May21, 1940 UNITED STATES PATENT OFFICE LOADING DEVICE FR SCANNING DRUMSHarold Carlson, White Plains, N. Y., assignor to The Associated Press,New York, N. Y., a corporation of New York 15 Claims.

This application is a division of application light projected from asuitable optical System Ser. No. 200,895, filed April 8, 1938.

This invention relates to a loading device for picture scanning drums.

An object of the invention is the provision of a device by which filmmay be removed quickly from detachable picture scanning drums andreplaced by unexposed lm with a minimum of handling of the sensitizedmaterial.

Other objects will appear in the following description given with theaid of the accompanying drawings, of which Figure l is a plan view ofone modification of the present invention;

Figures 2 and 3 illustrate the operation of the mechanism by which asensitized sheet is secured to a scanning drum;

Figure 4 shows` a tool for operating the film holding strip on thescanning drum;

Figure 5 is a section taken through the center of Figure l1;

Figure 6 is a section taken through sleeve |88 of Figure l;

Figure 'l is a detailed view of the pressure roller mounting; v

Figure 8 is a sectional showing of the drum and the guideway therefor inthe loading device.

The present invention contemplates a scanning drum |4 which is enclosedin a light proof casing 36, the latter being provided with a base 39,Figures 5 and 8, composed of three strips of metal, 50, 5| and 52secured to each other andl also to casing 36. The metal strip 5|,however,

is cut away for some distance beyond a slot All` in the base of casing36 on three sides, and the fourth side which will overlie acorresponding slot inthe base of the receiving machine, `not shown, iscompletely cut away for a distance somewhat greater than the length ofslot 40 which provides a recess between strips 50 and 5.2 into whichslides a shutter 53 which when closed renders light proof the part ofthe casing just referred to. A curved spring 55 secured to the baseprovides a yielding means for holding the shutter closed. The shutter,scanning drum and casing are fully described in co-pending application,Ser. No. 258,401, led Feb, 25, 1939.

When in use, the base of the casing is held by a suitable support, andthe drum shaft I5 which extends through light tight openings in casing36 is rotatably supported between suitable centers, not shown, so thatit may turn free of the casing, the sensitized material 2|3, Figure 2,carried by the drum being exposed by a scanning through slot 49 in thebase of casing 36.

The present invention discloses a mechanism by which sensitized sheetsmay be quickly replaced on the scanning drum with a minimum 5f ofhandling. The device consists of a base provided with a head stock |8|and a tailstock |82, the latter being provided with a spring plunger |9which may be locked in retracted position by means of pin 2| which isfree to travel in an L-shaped slot 22.

Two strips |83 are disposed on the base to form a support and guidewayfor base 39 of the cylinder casing. Strips |83 have lengthwise recesses|84 made in the top surfaces thereof to form guides for the ends of base39, the guides supporting the base at a height sufficient for thedepending shutter actuating pieces 51 to clear base |80, so as not toopen the shutter when the cylinder casing is inserted into theguideways. so'

The head and tail stocks are of the proper height to engage the centerson shaft I5 and disc Il which support cylinder i4 so that the latter maybe turned free of the casing.

The head stock consists of a bracket |85 through which extends shaft|86, at one end of which is a knob |87 and near the o-pposite end,adjacent to the bracket, is secured a sleeve |88 integral with disc |89having a square notch |90 cut in its periphery. This notch cooperateswith tooth |9| on the upper edge of lever |92 pivoted on screw |93supported by bracket |94 which is part of head stock bracket |85. Spring|95 presses lever |92 upward against disc |89.

Beyond disc |89 is secured an arm |96 carrying a pin |9'l projectingtherefrom parallel with shaft |86. Clamping screw |98 permits arm |96 tobe locked to shaft |86 in the desired angular position. Pin |91 isadapted toy t into slot |0 of disc on drum shaft l5 to form a connectionbetween knob |81 and the drum, permitting the latter to be rotated bythe knob.

Figure 6 shows the cylinder and knob |81 locked against rotation bytooth |9| on lever |92 which is shown positioned in notch |90 in disc|89. The parts may be freed for rotation by pressing downward on lever|92 which disengages the tooth and notch and if the disc is rotated atrifle and thereafter the lever is released, one complete turn of thecylinder may be made before the lever looks the cylinder again. Thismechanism is used for the purpose of positioning automatically a filmretaining clip 2|4 on the wA cylinder in respect to a loading platformwhich will now be described.

Located adjacent to guide strips |83 is a pair of brackets |00 securedto base |80 by screws 200. Between the brackets, and secured by screws20| to steps formed thereon is a shelf or loading platform 202. Theupper part of casing 36 has a longitudinal opening extending the lengthof cylinder i4 which lines up with platform 202 when the drum ispositioned in the loading device. The opening is provided with a curved,light proof cover 204 lined with felt 205 and hinged to the casing byhinge 20G. The cover overlaps opening 203 and edge 201' is retained whenthe cover is closed by lock 208. The lock is formed of a metal stripattached to casing 35 by shoulder screw 209 which extends through anelongated hole in the piece 208 permitting a limited sliding movement ofthe strip.

sensitized sheet 2|3 is held in place on the drum by retaining strip 2|4which extends the length of the drum. The retaining strip is held inplace by means of springs 2|5 fastened betvlveen shaft 32 and studs 2|0secured to strip 2 4.

A loading tool 2|'| having bifurcated arms 2i2 which carry pins 2|9 thatt openings on the retaining strip is used to tilt the strip sideways ineither direction, Figures 2 and 3, for the purpose of removing orinserting film. The edge of the retaining strip may be serrated ifdesired to prevent the film from slipping.

Extension brackets 220 are formed integrally with brackets |09 but areslightly offset therefrom so as to extend upward along the edges of theloading table 202 to form a guide for the edges of the film and tosupport a pressure roller 22|.

Roller 22| is rotatably supported by screws 222 which extend throughlugs 223 depending from cross-bar 224., the ends of which are yieldinglyheld by vertical rods 225 which pass through hollow adjusting screws 226which are threaded into brackets 220.

Roller 22| is located so that it engages the surface of drum I4 parallelwith shaft 32, and arm |96 is adjusted so that the retaining strip 2| 4just clears roller 22| during a lm changing operation. Springs 221 pressroller 22| against the cylinder surface, and this pressure may be variedby adjusting screws 225.

'I'he invention operates as follows: Assume that the casing is properlypositioned in the loading device with the drum shaft supported betweenthe centers thereof. Then the upper edge of the retaining strip may beraised as shown in Figure 3 releasing one edge of the film, andthereafter tool 2|| is Withdrawn and the film is ejected from the casingby turning knob |81 so that drum M is turned in a counterclockwisedirection until strip 2|l| again reappears. The opposite edge of thefilm may now be released from the retaining strip.

The drum automatically locks against rotation with the retaining stripproperly positioned in respect to loading table 202 for the loadingoperation. The new .film is guided between members 220 at the edges ofthe loading table, and one edge is inserted under retaining strip 2| 4as shown in Figure 2. The drum is then turned in a clockwise direction,and roller 22| presses the film evenly against the drums surface untilthe position shown in Figure 3 is reached when the strip 2 |4- is sprungfrom under the lm and tilted and released so as to overlie and retainthe edge of the film. Tool 2| 1 is then removed and the cover 204 closedand the drum is ready for another exposure operation.

What is claimed is:

l. In a film loading device for detachable scanning drums enclosed inlight proof casings, a guideway for supporting a casing, means forsupporting a drum so it may turn clear of the casing comprising aheadstock and a tailstock located respectively on opposite sides of saidguideway, manual means effective through said headstock for rotating thedrum in its supports, and means associated with one of said drumsupports adapted to arrest the rotary movement of the drum at the end ofeach revolution.

2. In a lm loading device for detachable scanning drums enclosed inlight proof casings, a guideway for supporting a casing, means forsupporting a drum so it may turn clear of the casing when the latter ispositioned in the guideway comprising a headstock and a tailstocklocated respectively on opposite sides of said guideway, manual meanseffective through said headstock for rotating the drum in its supports,a stop device associated with one of said drum supports adapted toarrest the rotary movement of the drum at the end of each revolution,and manually operated means for disengaging said stop device.

3. In a film loading device for detachable.

scanning drums enclosed in light proof casings, wherein the drum isprovided with a longitudinal clamping strip, and the casing with anaperture for the insertion of lm, a guideway for supporting a casing,means for supporting a drum so it may turn clear of the casing when thelatter is positioned in the guideway comprising a headstock and atailstock located respectively on opposite sides of said guideway,manual means effective through said headstock for rotating the drum inits supports, a stop device associated with one of said drum supportsadapted to arrest the rotary movement of the drum at the end of eachrevolution, and means for detachably securing said drum to saidheadstock so that said stop device is effective when the clamping stripis in alignment with the aperture in the casing.

4. In a lm loading device for detachable scanning drums enclosed inlight proof casings, wherein the drum is provided with a longitudinalclamping strip, and the casing with an aperture for the insertion offilm,'a guideway for supporting a casing, means for supporting a drum soit may turn clear of the casing when the latter is positioned in theguideway comprising a headstock and a tailsock located respectively onopposite sides of said guideway, manual means effective through saidheadstock for rotating the drum in its supports, a stop deviceassociated with said headstock adapted to arrest the rotary movementthereof once each revolution and means for setting said stop device tobecome effective at some predetermined angular position.

5. In a lm loading device for detachable scanning drums enclosed inlight proof casings, wherein the drum is provided with a longitudinalclamping strip, and the casing with an aperture for the insertion of thelm, a base, a guideway thereon for supporting a casing, means forsupporting a drum so it may turn clear of the casing when the latter ispositioned in the guideway comprising a headstock and a tailstocklocated respectively on opposite sides of said guideway, means fordetachably securing the drum to said headstock in a predetermined axialposition, manual means effective through said headstock for rotating thedrum in its supports, a stop device associated with said headstockadapted to arrest the rotary movement thereof once each revolution, saidstop device being effective when the clamping strip is in alignment Withthe aperture in the casing.

6. In a film loading device for detachable scanning drums enclosed inlight proof casings, wherein the drum is provided with a longitudinalclamping strip, and the casing with an aperture for the insertion of lm,a base, a guideway thereon for supporting a casing, means for supportinga drum so that it may turn clear of the casing when the latter ispositioned in the guideway comprising a headstock and a tailstocklocated respectively on opposite sides of said guideway, means fordetachably securing the drum to said headstock in a predetermined axialposition, manual means effective through said headstock for rotating thedrum in its supports, a stop device associated with said headstockadapted to arrest the rotary movement thereof once each` revolution,said stop device being eiective When the clamping strip is in alignmentwith the aperture in the casing, and a loading platform on said base forholding lm in alignment with the aperture in the casing.

'7. In a film loading device for detachable scanning drums enclosed inlight proof casings, wherein the drum is provided with a clamping strip,and the casing with an aperture for the insertion of iilm, a base, a.platform on said base for holding film in alignment with the aperture inthe casing, pressure roller means supported by said base adapted toenter said aperture and press the lm against the surface of the drumduring the loading operation, means for supporting a drum so it may turnclear of its casing when the latter is positioned in the guideway, saidmeans comprising a headstock and a tailstock positioned on oppositesides of said guideway, means for detachably securing the drum to theheadstock in a predetermined axial position, a knob on said headstockfor rotating the drum, a detent device associated with the headstockadapted to arrest the rotary movement thereof when said clamping stripis in alignment with the aperture in the casing, and a pivoted leversupported by said base for disengaging said detent.

8. In a film loading device for detachable scanning drums enclosed inlight proof casings, wherein the drum is provided with a clamping strip,and the casing withA an aperture for the insertion of iilm,` a base, aplatform on said base for holding film in alignment with the aperture inthe casing, pressure roller means supported by said base adapted toenter said aperture and press the iilm against the surface of the drumduring the loading operation, a headstock and a tailstock positioned onopposite sides of said guideway for supporting the drum so that it mayturn clear of its casing, means for detachably securing the drum to theheadstock in a predetermined axial position, a notched disc secured tosaid headstock and adapted to turn therewith, a spring pressed toothadapted to engage the edge of said disc and enter said notch, and a.manually operated member for disengaging said tooth and said notch.

9. In a device for changing film on a detachable scanning drum while thedrum is enclosed in a normally light proof casing provided with a filmchanging aperture, means for temporarily supporting said casing, meansfor supporting said drum, and manually operated means for turning saiddrum in said casing.

10. In a device for changing iilm on a detachable scanning drum whilethe drum is enclosed in a normally light proof casing provided with afilm changing aperture, means for temporarily supporting said casing,means for supporting said drum, means for attaching said drum to saidsupporting means in a predetermined angular position, and manuallyoperated means for turning said drum in said casing.

ll. In a device for changing film on a detachable scanning drum whilethe drum is enclosed in a normally light proof casing provided with a lmchanging aperture, a guideway for temporarily supporting said casing,means for supporting said ydrum so that it may turn clear of saidcasing, and manually operated means for turning said drum.

l2. In a device for changing hlm on a detachable scanning drum whileenclosed in a light proof casing provided with a film changing aperture,a guideway for temporarily supporting said casing, means for supportingsaid drum so that it may turn clear of said casing, and automatic meanseffective to stop the rotary movement of said drum at a predeterminedangular position.

13 In a device for changing film on a detachable scanning drum whileenclosed in a light proof casing provided with a film changing aperture,a guideway for temporarily supporting said casing, means for supportingsaid drum so that it may turn clear of said casing, means for attachingsaid drum to said supporting means in a predetermined angular position,and automatic means effective to stop the rotary movement of said drumat a predetermined angular position.

lll. In a device for changing film on a detachable scanning drum whileenclosed in a light proof casing provided with a film changing aperture,a guideway for temporarily supporting said casing, means for supportingsaid drum so that it may turn clear of said casing, means on said drumfor securing a sheet of film thereto, means for attaching said drum tosaid supporting means in a predetermined angular position, and automaticmeans effective to stop the rotary movement of said drum with the filmsecuring means aligned with the film changing aperture in the casing.

l5. In a device for changing film on a detachable scanning drum whileenclosed in a light proof casing provided with a film changing aperture,a guideway for temporarily supporting said casing, means comprising ahead stock and a tail stock for supporting said drum so that it may turnclear of said casing, means on said drum for securing a sheet of filmthereto, means for attaching said drum` to said head stock in apredetermined angular position, and automatic means effective throughsaid head stock for stopping the rotary movement of said drum with theiilm securing means aligned with the film changing aperture in thecasing, and manually operated means for releasing said drum from im

